File:Lithia pegmatite with rubellite tourmaline in lepidolite mica matrix (Pala Pegmatite, Early Cretaceous, 104-105 Ma; Stewart Mine, southern California, USA) 1.jpg
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| Description |
English: Lithia pegmatite (3.9 centimeters across) with deep purplish-pink rubellite tourmaline in a matrix of dark lavender lepidolite mica.
The Pala Pegmatite of southern California is unusual for having pockets of lithium-rich minerals. The sample seen here is lithia pegmatite consisting of grayish-purple lepidolite mica (KLi2Al(Al,Si)3O10(F,OH)2 - potassium lithium fluoro-hydroxy-aluminosilicate) and deep pink rubellite tourmaline (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 - sodium lithium hydroxy-boro-aluminosilicate). The lithia pegmatites occur as pockets within the granitic Pala Pegmatite (Peninsula Ranges Batholith/Southern California Batholith). The Pala Pegmatite was emplaced about 104-105 million years ago, during the Albian Stage of the late Early Cretaceous. Locality: Stewart Mine, NNE of the town of Pala, northwestern San Diego County, southern California, USA (33º 22’ 52” North latitude, 117º 03’ 49” West longitude) |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/14999319111/ |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/14999319111. It was reviewed on 23 December 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| current | 00:10, 23 December 2021 | | 961 × 847 (155 KB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/14999319111/ with UploadWizard |
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